#
9e7325ac |
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15-Feb-2024 |
Sean Christopherson <seanjc@google.com> |
KVM: s390: Refactor kvm_is_error_gpa() into kvm_is_gpa_in_memslot() Rename kvm_is_error_gpa() to kvm_is_gpa_in_memslot() and invert the polarity accordingly in order to (a) free up kvm_is_error_gpa() to match with kvm_is_error_{hva,page}(), and (b) to make it more obvious that the helper is doing a memslot lookup, i.e. not simply checking for INVALID_GPA. No functional change intended. Link: https://lore.kernel.org/r/20240215152916.1158-9-paul@xen.org Signed-off-by: Sean Christopherson <seanjc@google.com>
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#
0bc380be |
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15-May-2023 |
Christian Borntraeger <borntraeger@linux.ibm.com> |
KVM: s390/diag: fix racy access of physical cpu number in diag 9c handler We do check for target CPU == -1, but this might change at the time we are going to use it. Hold the physical target CPU in a local variable to avoid out-of-bound accesses to the cpu arrays. Cc: Pierre Morel <pmorel@linux.ibm.com> Fixes: 87e28a15c42c ("KVM: s390: diag9c (directed yield) forwarding") Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com> Reviewed-by: Nico Boehr <nrb@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
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#
bb000f64 |
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26-Jul-2021 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: restore old debugfs names commit bc9e9e672df9 ("KVM: debugfs: Reuse binary stats descriptors") did replace the old definitions with the binary ones. While doing that it missed that some files are names different than the counters. This is especially important for kvm_stat which does have special handling for counters named instruction_*. Fixes: commit bc9e9e672df9 ("KVM: debugfs: Reuse binary stats descriptors") CC: Jing Zhang <jingzhangos@google.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <20210726150108.5603-1-borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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#
87e28a15 |
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07-Sep-2020 |
Pierre Morel <pmorel@linux.ibm.com> |
KVM: s390: diag9c (directed yield) forwarding When we intercept a DIAG_9C from the guest we verify that the target real CPU associated with the virtual CPU designated by the guest is running and if not we forward the DIAG_9C to the target real CPU. To avoid a diag9c storm we allow a maximal rate of diag9c forwarding. The rate is calculated as a count per second defined as a new parameter of the s390 kvm module: diag9c_forwarding_hz . The default value of 0 is to not forward diag9c. Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> Link: https://lore.kernel.org/r/1613997661-22525-2-git-send-email-pmorel@linux.ibm.com Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
ca15ca40 |
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07-Aug-2020 |
Mike Rapoport <rppt@kernel.org> |
mm: remove unneeded includes of <asm/pgalloc.h> Patch series "mm: cleanup usage of <asm/pgalloc.h>" Most architectures have very similar versions of pXd_alloc_one() and pXd_free_one() for intermediate levels of page table. These patches add generic versions of these functions in <asm-generic/pgalloc.h> and enable use of the generic functions where appropriate. In addition, functions declared and defined in <asm/pgalloc.h> headers are used mostly by core mm and early mm initialization in arch and there is no actual reason to have the <asm/pgalloc.h> included all over the place. The first patch in this series removes unneeded includes of <asm/pgalloc.h> In the end it didn't work out as neatly as I hoped and moving pXd_alloc_track() definitions to <asm-generic/pgalloc.h> would require unnecessary changes to arches that have custom page table allocations, so I've decided to move lib/ioremap.c to mm/ and make pgalloc-track.h local to mm/. This patch (of 8): In most cases <asm/pgalloc.h> header is required only for allocations of page table memory. Most of the .c files that include that header do not use symbols declared in <asm/pgalloc.h> and do not require that header. As for the other header files that used to include <asm/pgalloc.h>, it is possible to move that include into the .c file that actually uses symbols from <asm/pgalloc.h> and drop the include from the header file. The process was somewhat automated using sed -i -E '/[<"]asm\/pgalloc\.h/d' \ $(grep -L -w -f /tmp/xx \ $(git grep -E -l '[<"]asm/pgalloc\.h')) where /tmp/xx contains all the symbols defined in arch/*/include/asm/pgalloc.h. [rppt@linux.ibm.com: fix powerpc warning] Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Pekka Enberg <penberg@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Joerg Roedel <joro@8bytes.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com> Cc: Stafford Horne <shorne@gmail.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Joerg Roedel <jroedel@suse.de> Cc: Matthew Wilcox <willy@infradead.org> Link: http://lkml.kernel.org/r/20200627143453.31835-1-rppt@kernel.org Link: http://lkml.kernel.org/r/20200627143453.31835-2-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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#
fe28c786 |
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15-May-2019 |
Janosch Frank <frankja@linux.ibm.com> |
KVM: s390: protvirt: Report CPU state to Ultravisor VCPU states have to be reported to the ultravisor for SIGP interpretation, kdump, kexec and reboot. Signed-off-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> [borntraeger@de.ibm.com: patch merging, splitting, fixing] Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
c7b7de63 |
|
15-Feb-2019 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: Do not yield when target is already running If the target is already running we do not need to yield. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
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#
8474e5ca |
|
15-Feb-2019 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: count invalid yields To analyze some performance issues with lock contention and scheduling it is nice to know when diag9c did not result in any action or when no action was tried. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
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#
a37cb07a |
|
23-Jan-2018 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: add vcpu stat counters for many instruction The overall instruction counter is larger than the sum of the single counters. We should try to catch all instruction handlers to make this match the summary counter. Let us add sck,tb,sske,iske,rrbe,tb,tpi,tsch,lpsw,pswe.... and remove other unused ones. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com>
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#
940f89a5 |
|
24-Nov-2017 |
Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
KVM: s390: Remove redundant license text Now that the SPDX tag is in all arch/s390/kvm/ files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cohuck@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Message-Id: <20171124140043.10062-9-gregkh@linuxfoundation.org> Acked-by: Cornelia Huck <cohuck@redhat.com> Acked-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
d809aa23 |
|
24-Nov-2017 |
Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
KVM: s390: add SPDX identifiers to the remaining files It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the arch/s390/kvm/ files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cohuck@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Message-Id: <20171124140043.10062-3-gregkh@linuxfoundation.org> Acked-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
0546c63d |
|
07-Aug-2017 |
Longpeng(Mike) <longpeng2@huawei.com> |
KVM: s390: implements the kvm_arch_vcpu_in_kernel() This implements kvm_arch_vcpu_in_kernel() for s390. DIAG is a privileged operation, so it cannot be called from problem state (user mode). Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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#
199b5763 |
|
07-Aug-2017 |
Longpeng(Mike) <longpeng2@huawei.com> |
KVM: add spinlock optimization framework If a vcpu exits due to request a user mode spinlock, then the spinlock-holder may be preempted in user mode or kernel mode. (Note that not all architectures trap spin loops in user mode, only AMD x86 and ARM/ARM64 currently do). But if a vcpu exits in kernel mode, then the holder must be preempted in kernel mode, so we should choose a vcpu in kernel mode as a more likely candidate for the lock holder. This introduces kvm_arch_vcpu_in_kernel() to decide whether the vcpu is in kernel-mode when it's preempted. kvm_vcpu_on_spin's new argument says the same of the spinning VCPU. Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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#
58cdf5eb |
|
04-Jul-2017 |
Heiko Carstens <hca@linux.ibm.com> |
KVM: s390: use new mm defines instead of magic values Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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#
1bb78d16 |
|
07-Jun-2016 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: provide logging for diagnose 0x500 We might need to debug some virtio things, so better have diagnose 500 logged. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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#
1e133ab2 |
|
08-Mar-2016 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
s390/mm: split arch/s390/mm/pgtable.c The pgtable.c file is quite big, before it grows any larger split it into pgtable.c, pgalloc.c and gmap.c. In addition move the gmap related header definitions into the new gmap.h header and all of the pgste helpers from pgtable.h to pgtable.c. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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#
e09fefde |
|
05-Nov-2015 |
David Hildenbrand <dahi@linux.vnet.ibm.com> |
KVM: Use common function for VCPU lookup by id Let's reuse the new common function for VPCU lookup by id. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> [split out the new function into a separate patch]
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#
ab7090a6 |
|
16-Jul-2015 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: add more debug data for the pfault diagnoses We're not only interested in the address of the control block, but also in the requested subcommand and for the token subcommand, in the specified token address and masks. Suggested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
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#
15e8b5da |
|
09-Jul-2015 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: Improve vcpu event debugging for diagnoses Let's add a vcpu event for the page reference handling and change the default debugging level for the ipl diagnose. Both are not frequent AND change the global state, so lets log them always. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
175a5c9e |
|
07-Jul-2015 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: add kvm stat counter for all diagnoses Sometimes kvm stat counters are the only performance metric to check after something went wrong. Let's add additional counters for some diagnoses. In addition do the count for diag 10 all the time, even if we inject a program interrupt. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
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#
e32edf4f |
|
26-Mar-2015 |
Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> |
KVM: Redesign kvm_io_bus_ API to pass VCPU structure to the callbacks. This is needed in e.g. ARM vGIC emulation, where the MMIO handling depends on the VCPU that does the access. Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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#
8ae04b8f |
|
19-Jan-2015 |
Alexander Yarygin <yarygin@linux.vnet.ibm.com> |
KVM: s390: Guest's memory access functions get access registers In access register mode, the write_guest() read_guest() and other functions will invoke the access register translation, which requires an ar, designated by one of the instruction fields. Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
f7a960af |
|
03-Sep-2014 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390/cmm: Fix prefix handling for diag 10 balloon The old handling of prefix pages was broken in the diag10 ballooner. We now rely on gmap_discard to check for start > end and do a slow path if the prefix swap pages are affected: 1. discard the pages from start to prefix 2. discard the absolute 0 pages 3. discard the pages after prefix swap to end Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
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#
6e0a0431 |
|
29-Apr-2014 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
KVM: s390/mm: cleanup gmap function arguments, variable names Make the order of arguments for the gmap calls more consistent, if the gmap pointer is passed it is always the first argument. In addition distinguish between guest address and user address by naming the variables gaddr for a guest address and vmaddr for a user address. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
6352e4d2 |
|
10-Apr-2014 |
David Hildenbrand <dahi@linux.vnet.ibm.com> |
KVM: s390: implement KVM_(S|G)ET_MP_STATE for user space state control This patch - adds s390 specific MP states to linux headers and documents them - implements the KVM_{SET,GET}_MP_STATE ioctls - enables KVM_CAP_MP_STATE - allows user space to control the VCPU state on s390. If user space sets the VCPU state using the ioctl KVM_SET_MP_STATE, we can disable manual changing of the VCPU state and trust user space to do the right thing. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
fda902cb |
|
13-May-2014 |
Michael Mueller <mimu@linux.vnet.ibm.com> |
KVM: s390: split SIE state guest prefix field This patch splits the SIE state guest prefix at offset 4 into a prefix bit field. Additionally it provides the access functions: - kvm_s390_get_prefix() - kvm_s390_set_prefix() to access the prefix per vcpu. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
6852d7b6 |
|
14-Mar-2014 |
David Hildenbrand <dahi@linux.vnet.ibm.com> |
KVM: s390: introduce kvm_s390_vcpu_{start,stop} This patch introduces two new functions to set/clear the CPUSTAT_STOPPED bit and makes use of it at all applicable places. These functions prepare the additional execution of code when starting/stopping a vcpu. The CPUSTAT_STOPPED bit should not be touched outside of these functions. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
81480cc1 |
|
01-Jan-2014 |
Heiko Carstens <hca@linux.ibm.com> |
KVM: s390: convert pfault code Convert pfault code to new guest access functions. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
b31605c1 |
|
25-Mar-2014 |
Dominik Dingel <dingel@linux.vnet.ibm.com> |
KVM: s390: make cmma usage conditionally When userspace reset the guest without notifying kvm, the CMMA state of the pages might be unused, resulting in guest data corruption. To avoid this, CMMA must be enabled only if userspace understands the implications. CMMA must be enabled before vCPU creation. It can't be switched off once enabled. All subsequently created vCPUs will be enabled for CMMA according to the CMMA state of the VM. Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> [remove now unnecessary calls to page_table_reset_pgste]
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#
d4cb1134 |
|
29-Jan-2014 |
Dominik Dingel <dingel@linux.vnet.ibm.com> |
KVM: s390: Clear storage keys page_table_reset_pgste() already does a complete page table walk to reset the pgste. Enhance it to initialize the storage keys to PAGE_DEFAULT_KEY if requested by the caller. This will be used for lazy storage key handling. Also provide an empty stub for !CONFIG_PGSTE Lets adopt the current code (diag 308) to not clear the keys. Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
1b6a19b3 |
|
31-Mar-2014 |
Christian Borntraeger <borntraeger@de.ibm.com> |
kvm/s390: also set guest pages back to stable on kexec/kdump We need to reset the usage state of the pages on kexec/kdump, which use subcode 0 and 1. We will only do the cmma reset in the kernel, everything else is done in userspace as before. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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#
deedabb2 |
|
21-May-2013 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
s390/kvm: set guest page states to stable on re-ipl The guest page state needs to be reset to stable for all pages on initial program load via diagnose 0x308. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
#
3c038e6b |
|
07-Oct-2013 |
Dominik Dingel <dingel@linux.vnet.ibm.com> |
KVM: async_pf: Async page fault support on s390 This patch enables async page faults for s390 kvm guests. It provides the userspace API to enable and disable_wait this feature. The disable_wait will enforce that the feature is off by waiting on it. Also it includes the diagnose code, called by the guest to enable async page faults. The async page faults will use an already existing guest interface for this purpose, as described in "CP Programming Services (SC24-6084)". Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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#
ff1f3cb4 |
|
09-Dec-2013 |
Dominik Dingel <dingel@linux.vnet.ibm.com> |
KVM: s390: ioeventfd: ignore leftmost bits The diagnose 500 subcode 3 contains the 32 bit subchannel id in bits 32-63 (counting from the left). As for other I/O instructions, bits 0-31 should be ignored and thus not be passed to kvm_io_bus_write_cookie(). This fixes a bug where the guest passed non-zero bits 0-31 which the host tried to interpret, leading to ioeventfd notification failures. Cc: stable@vger.kernel.org Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
|
#
743db27c |
|
11-Nov-2013 |
Heiko Carstens <hca@linux.ibm.com> |
KVM: s390: fix diagnose code extraction The diagnose code to be used is the contents of the base register (if not zero), plus the displacement. The current code ignores the base register contents. So let's fix that... Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: stable@vger.kernel.org Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
|
#
800c1065 |
|
12-Sep-2013 |
Thomas Huth <thuth@linux.vnet.ibm.com> |
KVM: s390: Lock kvm->srcu at the appropriate places The kvm->srcu lock has to be held while accessing the memory of guests and during certain other actions. This patch now adds the locks to the __vcpu_run function so that all affected code is protected now (and additionally to the KVM_S390_STORE_STATUS ioctl, which can be called out-of-band and needs a separate lock). Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
#
85dfe87e |
|
03-Jul-2013 |
Cornelia Huck <cornelia.huck@de.ibm.com> |
KVM: s390: use cookies for ioeventfd Make use of cookies for the virtio ccw notification hypercall to speed up lookup of devices on the io bus. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> [Small fix to a comment. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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#
93e1750f |
|
20-Jun-2013 |
Thomas Huth <thuth@linux.vnet.ibm.com> |
KVM: s390: Check for PSTATE when handling DIAGNOSE DIAGNOSE is a privileged instruction and thus we must make sure that we are in supervisor mode before taking any other actions. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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10ccaa1e |
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27-Feb-2013 |
Cornelia Huck <cornelia.huck@de.ibm.com> |
KVM: s390: Wire up ioeventfd. Enable ioeventfd support on s390 and hook up diagnose 500 virtio-ccw notifications. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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ade38c31 |
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23-Jul-2012 |
Cornelia Huck <cornelia.huck@de.ibm.com> |
KVM: s390: Add implementation-specific trace events Introduce a new trace system, kvm-s390, for some kvm/s390 specific trace points: - injection of interrupts - delivery of interrupts to the guest - creation/destruction of kvm machines and vcpus - stop actions for vcpus - reset requests for userspace Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
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5786fffa |
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23-Jul-2012 |
Cornelia Huck <cornelia.huck@de.ibm.com> |
KVM: s390: Add architectural trace events Add trace events for several s390 architecture specifics: - SIE entry/exit - common intercepts - common instructions (sigp/diagnose) Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
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a53c8fab |
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20-Jul-2012 |
Heiko Carstens <hca@linux.ibm.com> |
s390/comments: unify copyright messages and remove file names Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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8733ac36 |
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25-Apr-2012 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: use kvm_vcpu_on_spin for diag 0x44 Lets replace the old open coded version of diag 0x44 (which relied on compat_sched_yield) with kvm_vcpu_on_spin. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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41628d33 |
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25-Apr-2012 |
Konstantin Weitz <WEITZKON@de.ibm.com> |
KVM: s390: Implement the directed yield (diag 9c) hypervisor call for KVM This patch implements the directed yield hypercall found on other System z hypervisors. It delegates execution time to the virtual cpu specified in the instruction's parameter. Useful to avoid long spinlock waits in the guest. Christian Borntraeger: moved common code in virt/kvm/ Signed-off-by: Konstantin Weitz <WEITZKON@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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5a32c1af |
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11-Jan-2012 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: provide general purpose guest registers via kvm_run This patch adds the general purpose registers to the kvm_run structure. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
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9e6dabef |
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17-Nov-2011 |
Cornelia Huck <cornelia.huck@de.ibm.com> |
KVM: s390: Fix RUNNING flag misinterpretation CPUSTAT_RUNNING was implemented signifying that a vcpu is not stopped. This is not, however, what the architecture says: RUNNING should be set when the host is acting on the behalf of the guest operating system. CPUSTAT_RUNNING has been changed to be set in kvm_arch_vcpu_load() and to be unset in kvm_arch_vcpu_put(). For signifying stopped state of a vcpu, a host-controlled bit has been used and is set/unset basically on the reverse as the old CPUSTAT_RUNNING bit (including pushing it down into stop handling proper in handle_stop()). Cc: stable@kernel.org Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
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388186bc |
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30-Oct-2011 |
Christian Borntraeger <borntraeger@de.ibm.com> |
[S390] kvm: Handle diagnose 0x10 (release pages) Linux on System z uses a ballooner based on diagnose 0x10. (aka as collaborative memory management). This patch implements diagnose 0x10 on the guest address space. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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b8e660b8 |
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26-Feb-2010 |
Heiko Carstens <hca@linux.ibm.com> |
[S390] Replace ENOTSUPP usage with EOPNOTSUPP ENOTSUPP is not supposed to leak to userspace so lets just use EOPNOTSUPP everywhere. Doesn't fix a bug, but makes future reviews easier. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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33e19115 |
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08-Jan-2009 |
Heiko Carstens <hca@linux.ibm.com> |
[S390] Use unsigned long long for u64 on 64bit. As requested by Andrew. Same as what sparc did. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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b8cee18c |
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21-May-2008 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: use yield instead of schedule to implement diag 0x44 diag 0x44 is the common way on s390 to yield the cpu to the hypervisor. It is called by the guest in cpu_relax and in the spinlock code to yield to other guest cpus. This semantic is similar to yield. Lets replace the call to schedule with yield to make sure that current is really yielding. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
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e28acfea |
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25-Mar-2008 |
Christian Borntraeger <borntraeger@de.ibm.com> |
KVM: s390: intercepts for diagnose instructions This patch introduces interpretation of some diagnose instruction intercepts. Diagnose is our classic architected way of doing a hypercall. This patch features the following diagnose codes: - vm storage size, that tells the guest about its memory layout - time slice end, which is used by the guest to indicate that it waits for a lock and thus cannot use up its time slice in a useful way - ipl functions, which a guest can use to reset and reboot itself In order to implement ipl functions, we also introduce an exit reason that causes userspace to perform various resets on the virtual machine. All resets are described in the principles of operation book, except KVM_S390_RESET_IPL which causes a reboot of the machine. Acked-by: Martin Schwidefsky <martin.schwidefsky@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
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